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Brain and Behavior
Name and description of disorders affecting vision, audition, and touch/pain
54
Psychology
Undergraduate 3
03/04/2013

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Term
Akinetopsia
Definition
the inability to PERCEIVE movement
- V5 damage (dorsal stream)
- patient given in example was able to compensate somewhat by taking advantage of the Doppler effect in order to perceive how fast cars were moving toward her.
Term
Neglect
Definition
the inability to perceive 1/2 of a person's visual field
- damage to the right posterior parietal cortex
- usually neglect on the left side (cotralateral processing)
Term
Cerebral achromatopsia
Definition
the loss of color vision due to cortical damage
Term
V1, V2, and V8 (previously V4)
Definition
the regions of the brain that are activated by colored objects
Term
V8 only
Definition
the region of the brain that "perceives" colors
- inferior temporal cortex
Term
Lateral occipital (humans); inferior temporal cortex (primates)
Definition
the part(s) of the brain that are used for visual discrimination/object recognition
Term
TE (more posterior)
Definition
part of the ventral stream that probably codes for simple 2D forms
Term
TEO (more anterior)
Definition
part of the ventral stream that codes for complex 3D forms and images
Term
Fusiform Face Area
Definition
a specific part of the ventral stream that is responsible for facial recognition in humans
Term
Prosopagnosia
Definition
the failure to recognize people by faces
- bilateral damage to FFA region
Term
EBA or extrastriate body area
Definition
a perceptual area in the ventral stream responsible for recognizing different body parts
Term
PPA or parahippocampal place area
Definition
a perceptual area in the ventral stream responsible for recognizing different places or locations
Term
Conduction deafness
Definition
Damage to middle ear - bones don't conduct as well because of built up rigidity
Term
Sensorineural deafness
Definition
Damage to haircells and beyond - harder to treat
Term
Aphasic Disorders
Definition
impairment in language comprehension or production via CNS damage
- tumors, CVAs (stroke), brain injury
Term
Production aphasia
Definition
- first described by Paul Broca in 1861
- slow labored, non-fluent speech, agrammatism and anomia
- function words lost and content words spared
- damage to posterior portion of inferior frontal gyrus (AKA: Broca's Area)
Term
Comprehension aphasia
Definition
- first described by Cark Wernicke in 1874
- speech production is fluent, rhythmic but meaningless and speech comprehension is lost
- weirdly, seem unaware of problem
- damage to posterior portion of superior temporal gyrus (AKA: Wernicke's Area)
Term
Conduction aphasia
Definition
- predicted by Wernicke
- normal speech comprehension and production
- unable to repeat words, especially non-word sounds
- damage to arcuate fasciculus
Term
Pure Word Deafness
Definition
- hearing (non-word sounds), speaking, reading, and writing unimpaired
- damage to the connections between A1 and Wernicke's Area
- "I can hear you talking, but I cannot make out what you are saying."
Term
Pure Word Blindness
Definition
AKA: Alexia without agraphia
- normal speech production and comprehension
- reading lost and writing spared
- damage to angular gyrus
Term
Angular gyrus
Definition
reading comprehension
Term
Wernicke's Area
Definition
comprehension center
Term
Arcuate Fasciculus
Definition
relay center
Term
Broca's Area
Definition
production center
Term
Dyslexia
Definition
54-75% heritable; 68% concordance in MZ twins
Symptoms include 3 problem areas
- alphabetic/logographic processing to acquire fluent reading
- vocabulary and cognitive strategies for text comprehension
- motivation to read
Persistent
- word exposure: Good(2/day) vs. poor (1/year) readers
- poor reading at Grade 1 predicts reading at Grade 4 (90%) and at high school (75%)
Term
Event-Related Potentials (ERPs)
Definition
time-locked eletrical activity via EEG to external stimuli (language sounds)
- can predict whether a child will have dyslexia in children as young as 36 hours old.
Term
Wavelength
Definition
Hue or color
Term
Amplitude
Definition
Brightness
Term
Purity
Definition
Saturation
Term
Sclera and Cornea
Definition
Outer covering
Term
Pupil and Iris
Definition
Regulate light input
Term
Lens
Definition
focusing
Term
Retina
Definition
transduction
Term
Rods/Cones
Definition
transduction - part of retina
Term
Bipolar/Ganglion
Definition
Signaling
Term
Horizontal
Definition
Lateral inhibition
Term
Amacrine
Definition
Movement
Term
Cones
Definition
- Chromatic - color sensitive (wavelength sensitive: you have three types of cones that detect different levels of wavelengths)
- Non-saturable - can absorb tons of light energy under normal conditions (sham-wow): you use cones during the day because there's not enough light at night
- Less convergence - ability to see higher visual detail - higher visual acuity
- Fovea - directly behind the lens (most center part of the retina)
Term
Rods
Definition
- Achromatic - don't detect color (only have one type of rod, can't distinguish many different wavelengths
- Saturable - highly sensitive, a little bit of light is ok, but too much shuts them down (paper towel): too much light in the day, but work well at night)
- Highly convergent - converge signal (broad forms, not high detail)
- Periphery - further out from the center
Term
Pretectum
Definition
Reflex control of pupil and lens
Term
Superior colliculus
Definition
Orienting movements of head and eyes
Term
Dorsal Stream
Definition
Object recognition pathway
Term
Ventral Stream
Definition
Spatial vision pathway
Term
Apperceptive Visual Agnosia
Definition
- loss of high level perceptual processing
- retains low level feature detection
Term
Associative Visual Agnosia
Definition
- failure of object identification despite excellent visual acuity
Term
Middle Ear
Definition
Malleus, Incus, and Stapes (tympanic membrane = ear drum)
Term
Ventral Stream (Audition)
Definition
Temporal cortex and Inferior Frontal cortex
- pitch detection
Term
Dorsal Stream (Audition)
Definition
Superior Parietal and Superior Frontal cortex
- location detection
Term
Somatoparaphrenia
Definition
Disorder in which patient denies ownership of a limb or an entire side of one's body
- RH parietal damage
Term
Opioids
Definition
Morphine, Codine
- Broad use/ respiratory depression
Term
NSAIDs (COX inhibitors)
Definition
Indomethacin
- Inflammatory pain/GI or cardiac effects
Term
Antidepressants (NE and 5HT)
Definition
Amitriptyline
- Migranes and neuropathic pain
Term
Anticonvulsants (Na+ stabilizers)
Definition
Carbamazepine
- Neuropathic pain
Term
CB agonists
Definition
WIN55,212-2
- Cancer pain
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